Flame shield assembly for carbon black apparatus



Oct. 16, 1951 GLAXNER 2,571,127 I FLAME SHIELD ASSEMBLY FOR CARBON BLACK APPARATUS.

Filed Jan 1:5, 1950 INVENTOR )anz'e/ 674.1270 1 Patented Oct. 16, 1951 FLAME SHIELD ASSEMBLY FOR CARBON BLACK APPARATUS Daniel Glaxner, Pampa, Tex., assignor to Columbian Carbon Company, New York, N. Y., a corporation of Delaware Application January 13, 1950, Serial No. 138,295

4 Claims. 1

The present invention relates to improvements in apparatus for carrying on the manufacture of carbon black by the so-called channel process and, more particularly, to means for protecting the flames within the burning houses from side drafts which cause flickering of the flames and reduced yield of carbon black.

In the Reardon Patent ti -2,427,509, issued September 16, 1947, there are disclosed several arrangements of shields which may be used, with advantage, in promoting the quiescence of the flames and in reducing heat losses from the flames.

The advantages of protecting the flames against draft and against heat loss have been recognized. Nevertheless, the cost of equipping burning houses with shields and the maintenance of apparatus so equipped have been deterrents to the general adoption of such shields in this industry. In addition to the cost of equipping the burning houses with shields, the use of shields tends to complicate the cleaning of the burners, replacement of burner tips, and the like.

It is an object of my present invention to provide shields which may be supplied at a minimum expense, which may be installed in the presently used burning houses without modification of the latter, which. requirelittle or no attention and which cannot get out of adjustment.

These, and other advantages, are obtained by numeral l.

my present invention which provides flame shields which may be readily stamped from sheet metal and which may be assembled and installed without screws, bolts, rivets, or other usual fastening means.

The shields of my present invention are assembled and rigidly held together solely by cooperating slots. Each shield unit is adapted to shield the flames from a given length of two adjacent gas supply pipes and is adapted to be supported by the said two adjacent gas supply pipes without fastening means and without the possibility of shields becoming twisted about the burner pipe in a way which would distort, rather than preserve the flame structure. If desired, a single unit may span more than two burner pipes but for convenience of installing and maintaining, it is generally desirable to restrict the unit to a span of but 2 burner pipes.

There is nothing fundamentally critical about the length of the assembled units, that is, the distance which they extend along the burner pipes. However, for the reason just indicated and also for reasons of rigidity, it is usually desirableto restrict the length of the respective units to 3 to 4 feet, particularly when constructed from relatively thin sheet metal.

These units may be constructed in their entirety from six strips of sheet metal, or similar heat resistant material, per unit. The invention the gas supply pipes.

2 will be further described and illustrated by reference to the accompanying drawing which represents, somewhat fragmentarily, a complete shield unit, along with the collecting surfaces and gas supply pipes, in perspective.

In the drawing, the carbon collecting surfaces, e. g., channels, are indicated by the reference The gas supply pipes 2 are shown extending, one beneath each channel, as is well understood in the art. Gas nipples 3 are spaced along the upper surface of the gas supply pipes so that, in operation, flames of gas impinge on the lower surfaces of the channels I.

Extending transversely of the gas supply pipes and resting thereon are the end members 4, each being notched along its lower edges at 5 so as to be adapted to receive a gas supply pipe in each of the notches. Each of the end members is slotted along its upper edge as shown at 6. These slots extend toward the lower edge of the end members and, advantageously, are so positioned as to form an angle of about 30 with the vertical. The slots are sp ced equal disstances on ei her side of the notches, the end memb rs being so con tructed that the sots flare u ardly and outwardly from the notches.

The side me bers 7 are also slotted, as shown t the s ot" in the si e members cooperating wi h the slots in the end members, as clearly appears from the drawing.

The upper edges of the side members are, with advantage, bent over, or beaded, as shown at 9 as this arrangement provides additional rigidity.

The respective side members, as shown in the drawing, are bent downwardly along the line ID, at an elevation approximating that of the as supply pipe, so that the lower portions of the respective side members lie in substantially vertical planes.

Advantageously, the lower portions of the side members extend downwardly and substantially vertically a substantial distance below the gas supply pipes. It is not so important, however, that the end members extend downwardly below It would be possible to arrange the end members so that they rest on, and do not extend below, the upper surfaces of the gas supply pipes. However, without notches, such as shown at 5, or their equivalent, there would be a greater possibility of improperly positioning the flame shields with respect to the flames to be protected.

Advantageously, the end members and the slots therein for receiving the side members are so constructed and arranged that the side members may freely be moved upwardly out of the slots without interference from the channels.

The distance between the notches in the lower edges of the end members will, of course, depend upon the distance between centers of the gas pipes. treme ends of the end members coincide generally with the opposite outer edges of two adjacent channel members.

The length of the side members is subject to considerable variation. Shields which I have used with particular advantage commercially, were equipped with side members 40 inches in length and were used fabricated of a 20 gauge sheet steel. The end members were notched substantially as shown in the drawing, and were spaced apart approximately 21 inches, these end members being 2 /2 inches high and inches overall length.

In the particular installation illustrated, the upper surface of the gas supply pipe lay 3 inches below the lower surface of the channel members, the gas supply pipes were 15% inches 0. D. and the vertical sections of the side members were spaced 3 inches apart. From the bent line ID, the upper portion of the side members extended 3 inches upwardly and outwardly at an angle of 30 from the vertical. The slots in the side members and end members were 1 3' inch in width.

When it becomes desirable, or necessary, to clear the burner tips in the burning house equipped with flame shields of my present invention, it is only necessary to lift out one of the side members to do the necessary cleaning or to replace tips of each burner pipe. When the cleaning, or replacing, has been accomplished, the side member may be readily replaced. By reason of the construction of these shields, the fitting, cleaning and replacing may readily be taken care of by unskilled workmen without fear of improper adjustment of the shields with respect to the gas flames.

The simplicity of construction of the shields of the present invention, and the ease with which the unit may be assembled is a distinct economical advantage from the standpoint of shipping and storing. The end members are interchangeable, fit closely together, and may be shipped or stored in large numbers in very little space. The right and left side members are, likewise, interchangeable and, because of their simplicity of design, they may be fitted together in stacks and conveniently transported and stored.

It appears, therefore, that my flame shield units may be readily constructed from only two different elements, namely, the end elements and the side elements. This is a distinct advantage where flame shield units are used in large numbers and, particularly where, as is frequently the case, the burning houses are remotely located.

As previously indicated, the end members may extend across and rest upon more than two gas supply pipes. However, so constructed, the unit is less readily handled and some of its rigidity is sacrificed.

I claim:

1. Apparatus of the type described comprising two vertically disposed horizontally extending end members, each notched at two positions spaced along its lower edge to accommodate a gas supply pipe in each notch and each slotted at four positions spaced along its upper edge, the slots extending a substantial distance in a direction toward the lower edge of the end member, one slot being on either side of and equidistant from one of the notches, four substantially impervious, horizontally elongated vertically extending side It has been found desirable that the exmembers, extending between the end members, each of the side members being slotted at two points along its lower edge, the various elements being so constructed and arranged that the slots in the side members coincide with the slots in the end members so that the former are removably supported and held in an upright position by the latter.

2. In apparatus for producing carbon black by the impingement process comprising an enclosedchamber, a plurality of spaced substantially par-- allel, horizontally extending gas supply pipeswithin said chamber, a plurality of burner tipspositioned along the upper surface of the gas supply pipes and a metallic. surface so positioned above the burner tips as to constitute a carbon collecting surface against which flames from the burner tips impinge, the improvement which comprises substantially impervious flame shielding side members extending equidistant from and along each side of each gas supply pipe, said side members being supported by end members extending in a substantiallyvertical plane perpendicular to the gas supply pipes and restin upon at least two of the. gas supply pipes, the end members and side members being slotted along their upper and lower edges, respectively, the slots in the end members cooperating with the slots in the side members whereby the members are removably fitted together and supported in an upright position.

3. A flame shield particularly adapted to the shielding of flames in the manufacture of carbon black by the impingement process in apparatus comprising an enclosed chamber, a plurality of spaced, substantially parallel, horizontally extending gas supply pipes within'said chamber, a plurality of burner tips positioned along the upper surface of the gas supply pipes and a metallic surface so positioned above the burner tips as to constitute a carbon collecting surface against which flames from the burner tip impinge, said shield comprising two vertically disposed horizontally extending end members, each notched at two positions spaced along its lower edge to accommodate one of the gas supply pipes in each notch, each end member being slotted at four positions spaced along its upper edge, the slots extending a substantial distance in a direction toward the lower edge of the member, one slot being on either side of, and equidistant from, one of the notches, four substantially impervious horizontally, elongated, upright side members extending between the end members, each being slotted at two points along its lower edge, the various elements being so constructed and arranged that the slots in the side members coincide with the slots in the end members so that the former are removably supported and held in an upright position by the latter.

4. The apparatus of claim 3 further characterized in that the slots in the end members on either side of the notches are directed diagonally toward the notches and the lower edges of the respective side members are bent downwardly to a substantially vertical position.

DANIEL GLAXNER.

Name Date Wi liam a a1. Auga. 1948 Number 

2. IN AN APPARATUS FOR PRODUCING CARBON BLACK BY THE IMPRINGEMENT PROCESS COMPRISING AN ENCLOSED CHAMBER, A PLURALITY OF SPACED SUBSTANTIALLY PARALLEL, HORIZONTALLY EXTENDING GAS SUPPLY PIPES WITHIN SAID CHAMBER, A PLURALITY OF BURNER TIPS POSITIONED ALONG THE UPPER SURFACE OF THE GAS SUPPLY PIPES SAID A METALLIC SURFACE SO POSITIONED ABOVE THE BURNER TIPS AS TO CONSTITUTE A CARBON COLLECTING SURFACE AGAINST WHICH FLAMES FROM THE BURNER TIPS IMPINGE, THE IMPROVEMENT WHICH COMPRISES SUBSTANTIALLY IMPREVIOUS FLAME SHIELDING SIDE MEMBERS EXTENDING EQUIDISTANT FROM AND ALONG EACH SIDE OF EACH GAS SUPPLY PIPE, SAID SIDE MEMBERS BEING SUPPORTED BY END MEMBERS EXTENDING IN A SUBSTANTIALLY VERTICAL PLANE PERPENDICULAR TO THE GAS SUPPLY PIPES AND RESTING UPON AT LEAST TWO OF THE GAS SUPPLY PIPES, THE END MEMBERS AND SIDE MEMBERS BEING SLOTTED ALONG THEIR UPPER AND LOWER EDGES, RESPECTIVELY, THE SLOTS IN THE END MEMBERS COOPERATING WITH THE SLOTS IN THE SIDE MEMBERS WHEREBY THE MEMBERS ARE REMOVABLY FITTED TOGETHER AND SUPPORTED IN AN UPRIGHT POSITION. 